- RandomAccess interface and
- Remote interface
Now one question that would immediately pop-up in your mind is,
Why would one declare an empty interface?
What good is it of?
In general a common belief is that a marker interface is generally used to send some kind of signal to the JVM and instructs JVM to treat the class implementing it in a special way.
Like, when a class implements Cloneable marker interface, it signals the compiler that the class allows creation of clones of its objects.
Generally, a marker interface is used with the instanceof operator to check if a reference type variable refers to an object whose class implements the marker interface.
You may also like to read about:
- Why iterator is fail fast in java?
- Can we call run() directly on thread without calling start?
- Class variable vs instance variable
- iterator vs list iterator
- Why String is immutable in java?